What can be caused by many factors including a sudden drop in blood volume or pressure due to injury

Shock is a life-threatening condition that occurs when the body does not get enough blood flow. This can be caused by many factors, including:

* A sudden drop in blood volume or pressure, such as from a severe injury or blood loss

* Heart problems, such as a heart attack or arrhythmia

* Lung problems, such as a pulmonary embolism or pneumonia

* Infections, such as sepsis

* Allergic reactions, such as anaphylaxis

* Drug overdoses

Shock can lead to organ failure and death if not treated promptly. Symptoms of shock include:

* Rapid heart rate

* Weak pulse

* Low blood pressure

* Pale, cool, and clammy skin

* Nausea and vomiting

* Confusion

* Loss of consciousness

If you think someone is in shock, call 911 immediately. While waiting for help to arrive, you can:

* Elevate the person's legs

* Keep the person warm

* Loosen tight clothing

* Give the person sips of water if they are conscious and not vomiting